LA-ICP-MS Zircon U-Pb dating of diorite dyke in Jiangbasitao formation from Kalamaili area eastern Junggar,Xinjiang,and geological implications
Received:January 18, 2018  Revised:February 05, 2018
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KeyWord:Kalamaili; Jiangbasitao formation; diorite dyke; partial melting
                 
AuthorInstitution
Li Bingzheng 新疆大学地质与矿业工程学院
Gong Xiaoping 新疆大学地质与矿业工程学院
Li Xiaoguang 新疆大学地质与矿业工程学院
Han Bingjun 新疆大学地质与矿业工程学院
Liu Xiang 新疆大学地质与矿业工程学院
Liu Shijie 新疆大学地质与矿业工程学院
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Abstract:
      Jiangbathtao Formation mainly distributed along Kalamaili fault, a NW-SE strip distribution, which are exposed diorite dyke. The diorite dyke rock geochemistry, LA-ICP-MS zircon U-Pb dating study showed that the diorite dyke in in Jiangbasitao formation showed high alkali, potassium rich, enrichment of LREE and large ion lithophile elements (LILE), Nb Ta Ti, apparent loss, etc. high field strength elements (HFSE). Zircon dating shows that the 206Pb /238U age weighted average value of diorite dikes is 303.7±1.5Ma, (NSWD=0.94). It is the product of Late Carboniferous early magmatic activity. Diorite magmas may have formed in subducted plate fluids and subducted sediments, suggesting that the mantle mantle is partly fused to high degree.
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